Eric Zink didn't mince words when asked what he thought of a proposed redesign of the roads to Charleston International Airport.

"I think it's insanity," he said Wednesday.

Zink referred to plans to scrap International Boulevard as a direct route from Interstate 526 to the airport.

"It looks like a well-traveled public road is being appropriated for private use. As a taxpayer, that not only bothers me, it offends me," said Zink, 35, an engineer.

The changes have been described as a way to allow for Boeing expansion and improve traffic flow by creating a new airport road linking West Montague Avenue and Dorchester Road.

Zink was among about 100 people who attended a presentation at Jerry Zucker Middle School on Wednesday night to see three design alternatives proposed for the new airport road.

The $42 million Charleston County project will create about three miles of new four-lane roads.

A Boeing spokeswoman could not be reached Thursday afternoon.

The county said the effort will improve quality of life through better traffic operations, enhance economic development and increase competitiveness for business in the region, the county says.

"The Project will provide a new direct access road to Charleston International Airport and should relieve traffic congestion by providing a new connection from Dorchester Road to Montague Avenue near the Mark Clark Expressway (I-526)," the county says.

Judy Young said she was concerned that her mother's house in nearby Glynn Terrace would be taken by the project.

Carla McIntyre said she thought the three proposals just shifted traffic around rather than making it move better.

"I don't see any relief from traffic. I just see the flow being moved in a different direction," she said.'

The proposed changes will require detailed analysis under the National Environmental Policy Act. The state Department of Transportation and the Federal Aviation Administration will be part of the approval process.

Next February, a final choice, or preferred alternative, for the new airport road will be announced. Construction is estimated to begin in January 2016 and be completed in summer 2017.

Officials have said that the new road could attract industry by creating access to developable property and improving traffic flow for companies to transport goods.

The region's continued growth and increased passenger traffic at the airport, expansions at the Tanger Outlets and the presence of Boeing operations all within a few miles of each other off International Boulevard have caused congestion, officials said.